1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Alexus [3.1K]
3 years ago
12

How many molecules of CaCl2 are equivalent to 75.9g CaCl2 (Ca=40.08g/mol, CL=35.45g/mol)

Chemistry
1 answer:
melomori [17]3 years ago
7 0

Answer:

\large \boxed{4.12 \times 10^{23}\text{ formula unis of CaCl}_{2}}$}

Explanation:

You must calculate the moles of CaCl₂, then convert to formula units of CaCl₂.

1. Molar mass of CaCl₂

CaCl₂ = 40.08 + 2×35.45 = 40.08 + 70.90 = 110.98 g/mol

2. Moles of CaCl₂ \text{Moles of CaCl}_{2} = \text{75.9 g CaCl}_{2} \times \dfrac{\text{1 mol CaCl}_{2}}{\text{110.98 g CaCl}_{2}} = \text{0.6839 mol CaCl}_{2}

3. Formula units of CaCl₂

\text{No. of formula units} = \text{0.6839 mol CaCl}_{2} \times \dfrac{6.022 \times 10^{23}\text{ molecules CaCl}_{2}}{\text{1 mol P$_{2}$O}_{5}}\\\\= \mathbf{4.12 \times 10^{23}}\textbf{ formula units CaCl}_{2}\\\text{There are $\large \boxed{\mathbf{4.12 \times 10^{23}}\textbf{ formula units of CaCl}_{2}}$}

You might be interested in
What is the overall equation for FeCl3(aq) + NH3(aq) + H2O(l)? the overall ionic equation? then the net ionic equation?
diamong [38]
So the question ask to calculate the over all equation for a certain element and the following are 
- over all equation -  FE(OH)3+3NH4CI
- over all ionic equation -  e(OH)3 (s) & 3 NH4+ (aq) & 3Cl- (aq) - net ionic equation -  Fe+3+3OH-+3NH$++3CI-
4 0
3 years ago
Read 2 more answers
What should have only one idependent variable
jenyasd209 [6]
I think a controlled experiment
3 0
3 years ago
Which one of the following is a base?<br>A. HCI <br>B.Cu(OH)2 <br>C.HNO3 <br>D.HC2H3O2​
DedPeter [7]

Answer:

b. Cu(OH)2

Explanation:

As it is having Hydroxil ions(OH).

5 0
3 years ago
Read 2 more answers
Which water source becomes polluted as it travels over the earth?
never [62]

Run off

Explanation:

Run-off are the water sources that becomes polluted as they travel over the earth surface.

Surface run-off are water that moves on the earth surface. This water is a component of the water cycle which usually originate from precipitation.

  • As the water moves through different terrain it comes into contact with different pollutants.
  • Some of these run-off travels through mines, waste disposal sites among others.
  • This leads to the contamination of this form of water as it moves through these earth materials.
  • They are the most polluted water

Learn more:

Ocean water brainly.com/question/6760255

#learnwithBrainly

8 0
3 years ago
How does trace evidence end up transferring to the crime scene, suspect, or victim? Discuss some of the ways that this might hap
disa [49]
Trace evidence can end up transferring to the crime scene through Locard's Exchange Principle, which states that whenever two things come into contact with one another, there is an exchange of physical material A.K.A evidence. This exchange is most often done through physical contact, such as a struggle or a suspect attempting to hide evidence or alter the crime scene. It can even involve a suspect's shirt sleeve brushing against some wet paint.

I hope I helped!
3 0
3 years ago
Other questions:
  • The method used by Joseph Priestley to obtain oxygen made use of the thermal decomposition of mercuric oxide given below. What v
    12·1 answer
  • I need to know how do awnser this pease help.
    12·1 answer
  • Can I get some help please I’m lost :(
    10·1 answer
  • Why can't all the mixtures be classified as solutions?
    13·1 answer
  • How many atoms does an element make up
    12·2 answers
  • 1. Complete the following sentences:
    10·1 answer
  • Why do large area's of water change how the wind blows?
    15·2 answers
  • All matter has both physical and chemical properties.<br> True or False
    6·1 answer
  • Genetic material (DNA) can be found in:
    9·2 answers
  • In which way are plant and animals cells similar
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!